That one IS confusing, i know, but there are reasons for it.
EV41 and EV42 are taking place at the same day (both are the events where Arika has truly fallen) but rather categorising as just EV41, the second part is written as EV42.
I'm not certain that this is on purpose on TH's end, or if it is just a mistake, so I re-written the 'second half' as EV41 part 2, as the part 1 are the original EV41.
It may sound like i'm trying to make it simple, but at the same time confusing for some, but given TH's event plans (that can be seen
here and
here), it shouldn't be two seperated events in the first place, but one whole event for itself.
Once we get the full game, I will correct them if they are still labeled as EV42, although I might still do it sometime in the future for some reason.
Anyway, the ones called EV41 part 2 IS EV42. At least in my GoFile.